There are reports on the internet that Sebastian Stan the actor playing Bucky Barnes in Captain America: The First Avenger has signed a 5 or 6 picture deal with Marvel Studios, similar to Samuel L. Jackson's and Chris Evans' 9 picture deals.
But what 6 movies could we see Bucky/Winter Soldier in
It would only make sense he would appear in the rumor Captain America trilogy and any Avengers sequels as Winter Soldier